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The hob is a perfect example of how a little manufacturing ingenuity can make a reliable, highly productive cutting tool. It's an engineering specimen that creates higher cutting speeds, better wear resistance and increases rigidity. The cutting tool alone, however, can't take all the credit for its resourcefulness. Advanced coating technology from companies like Sulzer, Oerlikon Balzers, Ionbond, Seco Tools and Cemecon helps improve cutting tools by reducing overall costs, increasing tool life and maintaining the highest levels of productivity. The following is a quick recap of new technologies and the latest information in the coating market.
The complete Industry News section from the September 2013 issue of Gear Technology.
The complete Product News section from the July 2014 issue of Gear Technology.
The complete Product News section from the November/December 2014 issue.
Product news from the Gear Industry
News from around the Gear Industry
Latest news about the Latest Products
Latest new from the Gear Industry
News about the latest products in the industry.
The latest new products from EMAG, Emuge, Ransohoff, Seco Tools, Solar Atmospheres and more.
The complete industry news section from the May 2018 issue of Gear Technology.
The complete Industry News section from the November/December 2018 issue of Gear Technology.
The complete Industry News section from the June 2019 issue of Gear Technology./
Preview of some of the exhibits relevant to gear manufacturing at the upcoming EMO 2013.
Gear Technology hosts dinner for technical contributors to the gear industry during this year's AGMA Fall Technical Meeting and Gear Expo in Columbus, OH. Plus other news from around the industry.
The complete Product News section from the June 2017 issue of Gear Technology, featuring the latest from Liebherr, Heller, Sandvik Coromant, Mahr and more.
News from around the Gear Industry
Sandvik presents the latest in gear milling technologies.
Quality gear manufacturing depends on controlled tolerances and geometry. As a result, ferritic nitrocarburizing has become the heat treat process of choice for many gear manufacturers. The primary reasons for this are: 1. The process is performed at low temperatures, i.e. less than critical. 2. the quench methods increase fatigue strength by up to 125% without distorting. Ferritic nitrocarburizing is used in place of carburizing with conventional and induction hardening. 3. It establishes gradient base hardnesses, i.e. eliminates eggshell on TiN, TiAIN, CrC, etc. In addition, the process can also be applied to hobs, broaches, drills, and other cutting tools.
Previews of manufacturing technology related to gears that will be on display at IMTS 2012.
Booth previews from exhibitors showing products and services for the gear industry.
In the past, the blades of universal face hobbing cutters had to be resharpened on three faces. Those three faces formed the active part of the blade. In face hobbing, the effective cutting direction changes dramatically with respect to the shank of the blade. Depending on the individual ratio, it was found that optimal conditions for the chip removal action (side rake, side relief and hook angle) could just be established by adjusting all major parameters independently. This, in turn, results automatically in the need for the grinding or resharpening of the front face and the two relief surfaces in order to control side rake, hook angle and the relief and the relief angles of the cutting and clearance side.
In order to increase the load carrying capacity of hardened gears, the distortion of gear teeth caused by quenching must be removed by precision cutting (skiving) and/or grinding. In the case of large gears with large modules, skiving by a carbide hob is more economical than grinding when the highest accuracy is not required.
Users of gear-cutting tools probably do not often consciously consider the raw material from which those hobs, broaches or shavers are made. However, a rudimentary awareness of the various grades and their properties may allow tool users to improve the performance or life of their tools, or to address tool failures. The high-speed steel from which the tool is made certainly is not the only factor affecting tool performance, but as the raw material, the steel may be the first place to start.
Fig. 1 shows the effects of positive and negative rake on finished gear teeth. Incorrect positive rake (A) increase the depth and decreases the pressure angle on the hob tooth. The resulting gear tooth is thick at the top and thin at the bottom. Incorrect negative rake (B) decreases the depth and increases the pressure angle. This results in a cutting drag and makes the gear tooth thin at the top and thick at the bottom.
The cutting tool industry has undergone some serious changes in the last couple of years in both technology and the way the industry does business. The emerging technology today, as well as for the foreseeable future, is dry cutting, especially in high volume production settings. Wet cutting continues to be as popular as ever with lubrication advances making it more economical and environmentally friendly. There has also developed a process called "near dry cutting." this process offers many of the benefits of fluids while eliminating many of hte associated problems.
The chamfering and deburring operations on gear teeth have become more important as the automation of gear manufacturing lines in the automotive industry have steadily increased. Quieter gears require more accurate chamfers. This operation also translates into significant coast savings by avoiding costly rework operations. This article discusses the different types of chamfers on gear teeth and outlines manufacturing methods and guidelines to determine chamfer sizes and angles for the product and process engineer.
Rotary gear honing is a crossed-axis, fine, hard finishing process that uses pressure and abrasive honing tools to remove material along the tooth flanks in order to improve the surface finish (.1-.3 um or 4-12u"Ra), to remove nicks and burrs and to change or correct the tooth geometry. Ultimately, the end results are quieter, stronger and longer lasting gears.
The International Manufacturing Technology Show provided one of the biggest ever marketplaces for buying and selling gear-making equipment, with 121601 attenders, making it the largest IMTS ever. The show took place September 4-11 at McCormick Place in Chicago, IL.
Broaching is a process in which a cutting tool passes over or through a part piece to produce a desired form. A broach removes part material with a series of teeth, each one removing a specified amount of stock.
This article summarizes the development of an improved titanium nitride (TiN) recoating process, which has, when compared to conventional recoat methods, demonstrated tool life increases of up to three times in performance testing of hobs and shaper cutters. This new coating process, called Super TiN, surpasses the performance of standard TiN recoating for machining gear components. Super TiN incorporates stripping, surface preparation, smooth coating techniques and polishing before and after recoating. The combination of these improvements to the recoating process is the key to its performance.
Physical Vapor Deposited (PVD) coatings such as TiN (Titanium nitride) have been a boon for cutting tool manufacturers. They reduce wear and, therefore, extend tool life, which in turn reduces production costs. But PVD coatings are expensive, and when they fail, they cost both time and money, and they causes of the failure are not always readily apparent.
The complete Industry News section from the November/December 2012 issue of Gear Technology.
News about all of the upcoming products int he industry.
Investment in advanced new manufacturing technologies is helping to reinvent production processes for bevel gear cutters and coarse-pitch hobs at Gleason - delivering significant benefits downstream to customers seeking shorter deliveries, longer tool life and better results.
As coating technology improves to handle harsher conditions, cutting tool manufacturers are faced with new challenges during the resharpening process.
Everybody's working with carbide tools these days, but carbide materials are expensive. However, these cutting tool companies think they might have some solutions to extend tool life and reduce costs.
From standardization to automated, Industry 4.0 capable broachers, here's the latest in what's being developed in the field of broaching.
Mitsubishi Heavy Industries, Ltd. (MHI) conducted a comparison test between the super skiving cutter and the pinion skiving cutter used in the conventional skiving process and the test results are reported here.
How machine tool maintenance has evolved in recent years in gear manufacturing.
Meeting Todayâ€™s Requirements for High-Quality Gears
The complete Industry News section from the January/February 2019 issue of Gear Technology.
The author compares the standard two-face blade technology with the three-face blade technology for manufacturing bevel gears.
The complete Industry News section from the November/December 2013 issue of Gear Technology.
Manufacturers focus on tool design, materials, coating, machine tool options and cutting parameters.
The cutting tool is basic to gear manufacturing. Whether it's a hob, broach, shaper cutter or EDM wire, not much gets done without it. And the mission of the tool remains the same as always; removing material as quickly, accurately and cost-effectively as possible. Progress in the field tends to be evolutionary, coming gradually over time, but recently, a confluence of emerging technologies and new customer demands has caused significant changes in the machines, the materials and the coatings that make cutting tools.
News about the Latest Products
News from the Gear Industry
Manufacturing involute gears using form grinding or form milling wheels are beneficial to hobs in some special cases, such as small scale production and, the obvious, manufacture of internal gears. To manufacture involute gears correctly the form wheel must be purpose-designed, and in this paper the geometry of the form wheel is determined through inverse calculation. A mathematical model is presented where it is possible to determine the machined gear tooth surface in three dimensions, manufactured by this tool, taking the finite number of cutting edges into account. The model is validated by comparing calculated results with the observed results of a gear manufactured by an indexable insert milling cutter.
Recently, a new type of hob with carbide inserts has been introduced, providing higher cutting speeds, longer tool life and higher feed rates when compared to re-grindable, high-speed steel hobs. But with this kind of hob, new challenges occur due to positional errors of the cutting edges when mounted on the tool. These errors lead to manufacturing errors on the gear teeth which must be controlled. In this paper, the tooth quality of a gear manufactured by hobs with different quality classes is analyzed using a simulation model in combination with Monte Carlo methods.
Machine tools boost speed and throughput with automation technology.
A gear shaper cutter is actually a gear with relieved cutting edges and increased addendum for providing clearance in the root of the gear being cut. The maximum outside diameter of such a cutter is limited to the diameter at which the teeth become pointed. The minimum diameter occurs when the outside diameter of the cutter and the base circle are the same. Those theoretical extremes, coupled with the side clearance, which is normally 2 degrees for coarse pitch cutters an d1.5 degrees for cutters approximately 24-pitch and finer, will determine the theoretical face width of a cutter.
Gear shaping is one of the most popular production choices in gear manufacturing. While the gear shaping process is really the most versatile of all the gear manufacturing methods and can cut a wide variety of gears, certain types of gears can only be cut by this process. These are gears closely adjacent to shoulders; gears adjacent to other gears, such as on countershafts; internal gears, either open or blind ended; crown or face gears; herringbone gears of the solid configuration of with a small center groove; rack; parts with filled-in spaces or teeth, such as are used in some clutches.
In today's industrial marketplace, deburring and chamfering are no longer just a matter of cosmetics. The faster speeds at which transmissions run today demand that gear teeth mesh as smoothly and accurately as possible to prevent premature failure. The demand for quieter gears also requires tighter tolerances. New heat treating practices and other secondary gear operations have placed their own set of demands on manufacturers. Companies that can deburr or chamfer to these newer, more stringent specifications - and still keep costs in line - find themselves with a leg up on their competition.
The future gives the gear market plenty to think about in areas like automation, additive manufacturing and machine learning.
The proper design or selection of gear cutting tools requires thorough and detailed attention from the tool designer. In addition to experience, intuition and practical knowledge, a good understanding of profile calculations is very important.
The method of cutting teeth on a cylindrical gear by the hobbing process has been in existence since the late 1800s. Advances have been made over the years in both the machines and the cutting tools used in the process. This paper will examine hob tool life and the many variables that affect it. The paper will cover the state-of-the-art cutting tool materials and coatings, hob tool design characteristics, process speeds and feeds, hob shifting strategies, wear characteristics, etc. The paper will also discuss the use of a common denominator method for evaluating hob tool life in terms of meters (or inches) per hob tooth as an alternative to tool life expressed in parts per sharpening.
To meet the future goals of higher productivity and lower production costs, the cutting speeds and feeds in modern gear hobbing applications have to increase further. In several cases, coated carbide tools have replaced the commonly used high speed steel (HSS) tools.
A review of information published recently by manufacturers of CFC fixtures used in heat treating.
Furnace Suppliers and Heat Treaters Remain Busy During Tough Times
The complete Product News section from the May 2020 issue of Gear Technology.
Integrated Production Chains from Kapp Niles, an alternative to press quenching from Seco/Warwick, an expansion of the Profilator line and more.
Indexable carbide insert (ICI) cutting tools continue to play a pivotal role in gear manufacturing. By offering higher cutting speeds, reduced cycle times, enhanced coatings, custom configurations and a diverse range of sizes and capabilities, ICI tools have proven invaluable for finishing and pre-grind applications. They continue to expand their unique capabilities and worth in the cutting tool market.
The complete Product News section from the November/December 2019 issue of Gear Technology.
The complete Industry News section from the August 2018 issue of Gear Technology.
The following article highlights some of the recent heat treat products, technologies and industry news articles for gear manufacturing.
The following article highlights some of the new heat treat products, technologies and industry news articles that have come across our desks.
The latest technology on display in Columbus, OH. October 24-26.
The complete Industry News section from the June 2017 issue of Gear Technology.
In this special section, our editors have gathered recent news and information related to the heat treatment of gears. Here youâ€™ll find a comprehensive assortment of news and upcoming events that will help you understand the various heat treatment processes available for gears and choose the best option for your projects, whether you heat treat in-house or send your gears to a commercial heat treating provider.
Hobbing is probably the most popular gear manufacturing process. Its inherent accuracy and productivity makes it a logical choice for a wide range of sizes.
Hobs, broaches, shaper cutters, shaver cutters, milling cutters, and bevel cutters used in the manufacture of gears are commonly made of high speed steel. These specialized gear cutting tools often require properties, such as toughness or manufacturability, that are difficult to achieve with carbide, despite the developments in carbide cutting tools for end mills, milling cutters, and tool inserts.
In today's economy, when purchasing a new state-of-the-art gear shaper means a significant capital investment, common sense alone dictates that you develop strategies to get the most for your money. One of the best ways to do this is to take advantage of the sophistication of the machine to make it more than just a single-purpose tool.
Universal machines capable of cutting both spur and helical gears were developed in 1910, followed later by machines capable of cutting double helical gears with continuous teeth. Following the initial success, the machines were further developed both in England and France under the name Sunderland, and later in Switzerland under the name Maag.
What Is Whisker-Reinforced Ceramic? Whisker-reinforced ceramic as applied to cutting tool inserts comprises a matrix of aluminum oxide into which approximately 50% by volume of high-purity silicon carbide "whiskers" are randomly dispersed. The "whiskers" are, in fact, single crystals having dimensions of approximately 0.6 microns in diameter x 10-80 microns in length. These "whiskers" have a tensile strength on the order of 1,000,000 psi (690 MPa). The composite material that is the best known and most widely applied using this technology is designated WG-300 and manufactured by the Greenleaf Corporation of Saegertown, PA.
Question: We are interested in purchasing our first gear hobbing machine. What questions should we ask the manufacturer, and what do we need to know in order to correctly specify the CNC hardware and software system requirements?
Robots, computers and other signs of high technology abounded at IMTS 94, supporting the claim by many that this was one of the best shows ever. Many of the machines on display had so many robotic attachments and computer gizmos that they looked more like they belonged in some science fiction movie than on the floor of a machine shop.
Today's high technology hobs are visible different from their predecessors. Gear hobs have taken on a different appearance and function with present day technology and tool and material development. This article shows the newer products being offered today and the reasons for investigating their potential for use in today's modern gear hobbers, where cost reduction and higher productivity are wanted.
Question: I have just become involved with the inspection of gears in a production operation and wonder why the procedure specifies that four involute checks must be made on each side of the tooth of the gear being produced, where one tooth is checked and charted in each quadrant of the gear. Why is this done? These particular gears are checked in the pre-shaved, finish-shaved, and the after-heat-treat condition, so a lot of profile checking must be done.
Cutter Sharpening Cutter sharpening is very important both during manufacturing and subsequently in resharpening after dulling. Not only does this process affect cutter "over cutting edge" quality and the quality of the part cut, but it can also affect the manner in which chip flow takes place on the cutter face if the surface finished is too rough or rippled.
A brief introduction to the subject of Thin Film Coatings and their application to gear hobs and shaper cutters is followed by a detailed description of the Chemical Vapor Deposition Process and the Physical Vapor Deposition Process. Advantages and disadvantages of each of these processes is discussed. Emphasis is placed upon: application engineering of coated gear tools based on laboratory and field test results. Recommendations are suggested for tool design improvements and optimization of gear cutting operations using coated tools. Productivity improvements potentially available by properly utilizing coated tools are considered in terms of both tool cost and machining cost.
The gear hobbing process is a generating type of production operation. For this reason, the form of the hob tooth is always different from the form of the tooth that it produces.
Some gear-related highlights from the recent EMO show in Hannover, Germany.
There are a number of companies working to change the way broaching is perceived, and over the past 10 years, theyâ€™ve incorporated significant technological changes to make the process more flexible, productive and accurate.
Indexable carbide insert cutting tools for gears are nothing new. But big gears have recently become a very big business. The result is that there's been a renewed interest in carbide insert cutting tools.
Faster, more efficient manufacturing offered with table-top design from American Broach & Machine.
This article presents some of the findings of cutting investigations at WZL in which the correlation of cutting parameters, cutting materials, tool geometry and tool life have been determined.
Today, because of reduced cost of coatings and quicker turnaround times, the idea of all-around coating on three-face-sharpened blades is again economically viable, allowing manufacturers greater freedoms in cutting blade parameters, including three-face-sharpened and even four-face-sharpened blades.
As we approach the problem of hard gear processing, it is well to take a look at the reason for discussing it at this time. In our present economic atmosphere throughout the world, more and more emphasis is being placed upon efficiency which is dictated by higher energy costs.
A Look at Complex, High-Performance Five-Axis Machining Solutions.
News Items About seco tools
1 Seco Tools Offers Free Online Tooling Resource (October 22, 2021)
Seco Tools customers reduce the time they need for process optimization with quick, expert tooling recommendations through the recently r... Read News
2 IMTS 2016: Seco Tools (W-1564) (September 8, 2016)
Square T4-12With larger insert sizes, Seco's T4-12 line of square shoulder and helical milling cutters allows parts manufacturers to ... Read News
3 Seco Tools Acquires NC Industries and Diamond Tool Coating (January 10, 2011)
Seco Tools has signed an agreement to acquire the American companies NC Industries (NCI) and Diamond Tool Coating (DTC). NCI is a produce... Read News
4 Seco Tools Launches Aerospace Website (February 4, 2011)
Seco Tools has launched a new website dedicated to supporting aerospace manufacturers. The website hosts a wealth of information pertinen... Read News
5 Seco Tools Joins Mazak VIP Program (June 3, 2011)
Mazak has announced it has certified Seco Tools, a provider of metalcutting solutions for milling, turning, holemaking and toolholding, a... Read News
6 IMTS Preview - Seco Tools (June 5, 2012)
Seco Tools will meet the increased productivity needs of various manufacturers, from aerospace to windpower to automotive to medical, by ... Read News
7 Seco Tools Displays Latest Machining Solutions (November 3, 2012)
At the JEC Americas 2012 Composites Show taking place Nov. 7 – 9 in Boston, Seco Tools will spotlight advanced solutions for effici... Read News
8 Seco Tools Hosts Successful Manufacturing Event (January 17, 2013)
Seco Tools, two-time recipient of the National Association for Business Resources “Best and Brightest Companies to Work For” ... Read News
9 Seco Tools Inks Sponsorship Deal with Andretti Autosport (July 23, 2013)
Seco Tools recently signed on as a technical and supplier sponsor of the IZOD IndyCar Series championship racing team Andretti Autosport.... Read News
10 Seco Tools Announces Organizational Changes (January 28, 2014)
Seco Tools, LLC has appointed Todd Miller as its new manager of product marketing and initiated other key organizational changes within t... Read News
11 IMTS Preview: Seco Tools (July 3, 2014)
Seco Tools, LLC (Booth W-1564) will unveil several new milling, turning, threading and tool holding products that were developed with mat... Read News
12 Seco Tools' Carbide Recycling Program Continues to Expand (January 22, 2015)
Seco Tools, LLC recently reported that it collected 15 percent more used carbide in 2014 than the previous year for its North American Ca... Read News
13 Seco Tools Jabro-Solid2 JS554 Solid-Carbide End Mill Gains New Neck Diameter Options (November 15, 2016)
The Jabro-Solid2 JS554 range of solid-carbide end mills has improved its utility and versatility with smaller neck diameter options. Thes... Read News
14 Seco Tools Partners with Fusion Coolant Systems (April 12, 2021)
In an effort to become more sustainable in its machining practices, Seco Tools has partnered with Fusion Coolant Systems (Fusion), which ... Read News
15 Seco Tools Promotes Thomas Funke to Component Engineered Tooling Manager (April 4, 2017)
Seco Tools, LLC recently promoted Thomas Funke to Component Engineered Tooling (CET) Manager to drive the expansion and enhancement of th... Read News
16 Seco Tools Hires Olivier Branget, Promotes Aaron Eller (April 18, 2017)
Seco Tools, LLC continues to fortify its service and support team with the addition of Olivier Branget to its North American Applications... Read News
17 Seco Tools PCBN Insert Grade Family Expanded with Four New Hard Turning Grades (June 27, 2017)
Seco Tools has expanded its family of PCBN insert grades to cover the entire spectrum of hard part turning applications. Using a new bimo... Read News
18 Seco Tools New Tooling Systems Designed for Flexibility, Delivering Precision (November 2, 2017)
Seco continues to evolve and develop tooling solutions that exceed the demands of the metalcutting industry. Two of the company's lat... Read News
19 Seco Tools Double-Sided Round Inserts Deliver Performance Upgrades (November 14, 2017)
Seco Tools has introduced its R217/220.28 cutters with completely new body designs that incorporate double-sided round inserts to deliver... Read News
20 Seco Tools Announces New Manager of Engineering Services (October 12, 2018)
Seco Tools has named Tyler Martin as its new manager of engineering services. Formerly the manager of technical services, Martin previo... Read News
21 Seco Tools Wins Supplier Award from Distributor Organization (November 27, 2018)
Seco Tools was awarded Supplier of the Year at the 2018 gathering of the Affiliated Distributors Industrial Members, Suppliers and Servic... Read News
22 Seco Tools Introduces New Threading Inserts (January 2, 2019)
Seco Tools has introduced 13 new full-profile threading inserts for internal UNJ and MJ thread profiles. Now a full range of UNJ and MJ t... Read News
23 Seco Tools Names Director of Customer Experience (April 15, 2019)
To maximize customer engagement and satisfaction, Seco Tools has named Bill Barcelona as director of customer experience. In this new rol... Read News
24 Seco Tools Announces New Duratomic Grades for Stainless Steel Turning (September 6, 2019)
Seco Tools has announced the release of three new grades specifically for stainless steel turning featuring the company’s latest Du... Read News
25 Seco Tools Offers IIoT Solutions for HMLV Production (June 9, 2020)
Seco Tools Manufacturing Transformation helps customers address the challenges of high-mix/low-volume (HMLV) production and other modern ... Read News
26 Seco Tools Announces Component Engineered Tooling Partnership (June 27, 2007)
Seco Tools Inc. announces Component Engineered Tooling (CET), the newest offering from its Seco Business Solutions service provisions mad... Read News